Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5916de3c7607311d7e66fab4b41ea056f4c6de982cb2c1c1ddc884bd59657b51' 
  AND token = 'uHXTCikeBppihkpfcit9aXKfhikil73nu19qlWO+8e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}